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    • Keywords


      Qubit; telegraph noise; Liouville operators.

    • Abstract


      The qubit (or a system of two quantum dots) has become a standard paradigm for studying quantum information processes. Our focus is decoherence due to interaction of the qubit with its environment, leading to noise. We consider quantum noise generated by a dissipative quantum bath. A detailed comparative study with the results for a classical noise source such as generated by a telegraph process, enebles us to set limits on the pplicability of this process $\nu is à \nu is$ its quantum counterpart, as well as lend handle on the parameters that can be tuned for analysing decoherence. Both Ohmic and non-Ohmic dissipations are treated and appropriate limits are analysed for facilitating comparison with the telegraph process.

    • Author Affiliations


      Ebad Kamil1 2 Sushanta Dattagupta1 3

      1. Indian Institute of Science Education and Research-Kolkata, Mohanpur 741 252, India
      2. Institute for Theoretical Physics, Friedrich Hund Platz 1, University of Goettingen, Germany
      3. Visva-Bharati, Santiniketan 731 235, India
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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